Mantle mounting for incandescent mantle lamps



' July 22, 1952 w, B, N 2,603,959

MANTLE MOUNTING FOR INCANDESCENT MANTLE LAMPS Filed May 13, 1950 5 Sheets-Sheet 2 INVENTOR. W4 LTEE D. ENGH.

AITOEEEY July 22, 1952 w. B. ENGH 2,603,959

MANTLE MOUNTING FOR INCANDESCENT MANTLE LAMPS filed May 13, 1950 3 Sheets-Sheet 3 INVENTOR. W/IL T525. ENC-3H ATT EYS.

Patented July 22, 1952 UNITED STATES MANTLE MOUNTING FOR INCANDESCENT MANTLE LAMIPS Walter B. Engh, Alexandria Incl, assignor to Aladdin Industries, Incorporated, Chicago, 111., a corporation of Illinois Application May'13, 1950, Serial No. 161,813

Claims.

The invention pertains to incandescent mantle lamp burners forilluminatingpurposes, and cornprises an improvement in mantle mountings for such burners.

It is an object of the invention to produce a mantle mounting in which the burner cone directing outer air to the flame of the burner, comprises the base of the mantle mounting and at the same time constitutes a-cente'ring means for the lower end of the mantle; it is a further object of the invention to combine with said centering means and radially spaced therefrom, an outer annular wall loosely encircling the lower portion of the mantle, which supports the harp of the mantle mounting; it is afurther object of them-- vention to control the flow of outer air to the mantle by perforations in said annularwall, of a size and spacing. effecting uniform distribution of said outer air to the outer surface of the mantle in optimum amount; it is a further object of the invention to combine the lower portions of the burner cone and annular wall into a single annular and cylindrical flange for mounting purposes on the gallery of the burner; it is a further object of the invention to construct the burner cone and said annular wall'of thin sheet metal having high resistance to heat conduction, to reduce to a minimum the heat conducted by the mantle mounting to the gallery of the'burner; and it is a further object ofthe invention to accurately construct the burner cone, and to accurately mount it on the gallery of the burner, so that in cooperation with the baffle of the burner, it will accurately meter outer air supplied-in optimum amount to the flame of the burner, andso that with each mantle renewal, the burner will be supplied with a new burner cone having all of the air metering accuracy'of the original burner structure.

The invention will be best understood by referenceto the accompanying drawings illustrating apreierred embodiment thereof, in which Fig. 1 shows to anenlarged scale, a burner of which the invention is a part, in central, vertical, sectional view, I 1 I Fig- 2 shows: to a further enlarged scale and in a view similar to Fig. 1, the parts of the burner directly involved in controlling the flow through the burner of the several. air currents requisite for the effective. operation of the burner,

Fig. 3 is a plan view of the mantle mounting shown in Fig. I, removed from the rest of the burnerstructure, I

Fig. 4 isa view in elevation of the structure showninFigS,

Fig. 5 is a vertical, sectional view to an enlarged scale of part of the structure of Fig. l, taken along the line Ei'5 in Fig. 4, and

Fig. 6 is a horizontal, sectional view of part of the structure shown in Fig. 4, taken along the line 6-6 in Fig. 4. v

Similar numerals refer to throughout the several views. I r I As shown in Fig. 1, the burner illustrating the operation of the invention, comprises a cylindrical basket ll! of sheet metal, which is provided with numerous perforations to permit the free flow of the air into the basket, required for: the operation of the burner. The lower portion of the basket, not shown, is provided in any known manner, with means for'mou-nting the burner on a fuel font or reservoir. While the invention is applicable to different types of burners, the burner illustrated is of the side draft type having'an inner wick tube l l rigidly supported by the basket coaXially therewith, and supplied with inner air from said basket. The inner wick tube ll supports a wick H! which is tubular at its. upper portion, and movable vertically on' said' tube by any known wick operating mechanism, not shown. An outer Wick tubeis shown, consisting'of upper and lower portions [3 and; l-i respectively, the upper portion 13 at its upp'erend portion being closely adjacent the. outersurf'ace of the Wick, and a short distance below'itsupper' end, being zof substantially enlarged diameter providing aspace between the tube and the wick in which the wick operating mechanism maybe located." Tlreglower end of the tube portion i3 is provided with a seat resting on the upper endofthetube portion it, and aligning the twortube portions 'so'that they are coaxial with each other and with the wick and the inner wick tube- Theupperportion I3 is readily removable from the lower. portion 14 for cleaning purposes and to facilitate wick renewal. The lower tube portion M .is rigidly supsimi-lar parts ported at its lower end by the-basket id to effect the coaxial. relationships expressed. I

The basket iii removablysupports-at its upper end, a'gallery t5 comprising a support'fo'r .a chimney ltand also a support for a mantle mounting ll, 13', the latter beingremovable from the gallery to facilitate mantle renewal. l 1

The-outer wall of' the gallery i5 is conical in form, converging upwardly. and from its inner mi'd' portion, a bafile l9 extends'in theaform of a flat cone converging upwardly, from the gallery outer wall towards the outer Wick tube'portion l3, and then it extendscylindrically and upwardly with a small radiat spacing.fromfthe-npper-end of the tube portion l3 and terminates a short distance above the upper end of the said tube portion and a substantial distance below the member l8 of the mantle mounting, said baffle at its upper end being provided with a horizontal flange of small radial extent projecting towards the axis of the burner.

The wick tubes I I and I3 terminate in substantially the same horizontal plane, and the tube I3 carries at its upper end a flame flange slightly,

spaced from the vertical portion of the baffle l9.

' The member l8 of the mantle mounting constitutes the burner cone of the burner, and it has a vertical wall spaced from the member I! to receive in a groove thus formed, the lower edge of the mantle 2| and protect and center the same relatively to the flame produced above the wick l2.

The inner wick tube II is provided at its upper end, with a cylindrical flame spreader 22 substantially closed at its upper end and having its vertical wall above the tube H, perforated to direct inner air to and into the flame of the burner.

The vertical, cylindrical portion of the member l8 extends substantially below its seat on the upper end of the gallery [5, and the member [1 is cylindrical above said seat and provided at said seat with a horizontal flange resting thereon, and below said seat said member is cylindrical and closely fits the cylindrical lower portion of the member l8, where said members are secured together to form an integral mounting structure for the mantle.

The lower portion of the chimney I6 is conical in form, and is parallel with and slightly spaced from the conical gallery Hi to provide a, restricted passageway 32 for outer mantle air to flow upwardly and through perforations 3| in the upper cylindrical portion of the member [1, to the mantle.

The parts described, unless otherwise stated, are of circular cross-section horizontally and have a coaxial relation to each other.

Where certain of the parts are above described as readily removable from adjacent parts, said parts are constructed in each case to establish a coaxial relation of the parts, and devices of known kind are preferably employed for removably securing the parts together for use, for example, any desired forms of bayonet connections.

As shown in Fig. 1, the mounting member, I! supports a harp '23 which in turn supports the mantle 2| around the flame of the burner.

In view of the flow of air currents through the burner being an important consideration in the present case, reference is made to Fig. 2 illustrating said flow, from which the present invention may be more clearly understood. As shown in Fig. 2 inner air A flows upwardly in the inner wick tube H to and through the perforations in the flame spreader 22 and upwardly and outwardly therefrom to the inner portion of the flame 24 to provide the requisite inner air for the production of the blue flame desired to incandesce the mantle 21'. It will be noted that the flame spreader 22 is imperforate at its upper end, excepting for a small central aperture 25. This permits a restricted amount of inner air A1 to flow into the flame which is hollow and closed at its upper end, to expand the upper portion of the flame and give it more nearly the form of the mantle, thereby more effectively incandescing the upper portion of the mantle.

Outer air B flows upwardly from the basket. I!)

around the outer wick portion tube [3, between said tube portion and the lower portion of the gallery l5, and through an annular row of large perforations l9a in the baffle l9, and through the annular space between thelower cylindrical portion of the member I8 and the upper cylindrical portion of the baflie I9, into the space immediately below the horizontal portion of said member 18; said horizontal portion stops the vertical flow of the tubular column of outer air B, and requires said column to make a substantially degree turn under the horizontal portion of the member l8, so that said column B will be discharged from under the inner edge of said horizontal portion, in a horizontal direction against and into the outer surface of the flame and of the column of vaporized gas ascending from the wick I2; this action is insured by the projection of the lower edge of the member 18, substantially below the upper end of the bafile l9, which prevents column B from taking an oblique course towards the flame and vapor column, which in turn would materially reduce the penetration of the air of column B into said flame and vapor column, with corresponding reduction in the burning efiiciency of the flame. A small part B1 of the air of column B is by-passed therefrom through small apertures 19!, in the upper end of the baflle [9, which air B1 flows around the inner edge of the short flange on the upper end of the bafile, through a clearance space between said flange and the wick 12, to join the main column B above the wick; this prevents undue heating of the upper portion of the bafile, and tends to raise the flame from the upper end of the wick. At the same time an even smaller amount of air B2 is by-passed from the column B, inside of the upper portion of the baffle and between it and the edge of the flame flange 20, above which it joins by-passed air B1; this prevents the undue communication of heat from the flame flange to the baffle. The relation of the lower and inner surfaces of the member l8 to the surfaces of the upper end portion of the baffie l9 and of its upper end flange, meters the outer air supplied to the flame and insures that the amount of outer air so supplied shall be optimum for the intended purposes.

The flame 24 delivers a large quantity of gases of combustion C that are very hot, which gases are in large part projected against the mantle 2i and into and through its meshes, to incandesce said mantle.

In the above-operation, the effectiveness of incandescing the mantle, is determined not only by the accurate proportioning of the air to the liquid fuel burned, but frequently by the purity of said fuel. In the practical operation of burners in the manner and for the purpose described, it frequently has happened that carbon spotshave formed on the mantles and particularly on their lower portions, that have materially reduced the illuminating efiiciency of the mantles. To remedy this condition, additional air flow is produced in the burner, as shown in Fig. 2. The chimney 16, which is preferably of glass, has a lower end that is a planesurface, and rests on equally spaced humps 26 extending upwardly from the seating portion of the gallery [5 at its lower end; as a result, a small annular air passageway 33 is produced between the lower end of the chimney and the gallery excepting at said humps 26. The lower end of the gallery is surrounded by and rigidly secured to an annular retaining band 21, which band is provided with a row of closely spaced perforations 28in line with lower end of the. chimney is provided with equallythe passageway 33. The

spaced humps 29- extending laterally and outwards from it-for engagement with corresponding holding lugs 30 extending inwardly from the upper. edge of' the band 21, whenthechimney is in. place on the-humps 26. The humps-29 extend under the lugs30-toa position closely adjacent the inner surface of theband 21, to center the chimney relatively to the gallery I 5,.whichmaintains the passageway. 32 between the conical portions ofthe chimney and gallery of substantially uniform-radialextent throughout. Thus air from outside of the burneris drawn in a column D through the perforations 28 and under the chimney andthen upwardly through the passageway 32, by the heated air. in the chimney, which column D is projected with substantial velocity through the apertures 3! in the mounting member IT and. then upwards along and entirely around the. outer. surface of the mantle. The air ishighly heated in its upward passage between the chimney and the gallery, and unburned carbonparticles that may have lodged in the mantle meshes:in unburned condition, are very hot from the action of the flame, and as a'result, the outer mantle air burnsthecarbon spots and-clears the mantle. of them, thereby improving the illumihating power of the mantle.

The holes I9b extending around the upper portion of the baffle t9. prevent accumulation of a tarry deposit on the'upper end of' the flame flange 20; Thisdeposit, if permitted to formand accumulate, eventually obstructs the small annular space between flange 20' and the baiile iii to prevent flow of the cooling and air directing auxiliaryflow of air (31 through that space. The air flow through the holes lllb' wipes off the vapor izedfuel that otherwise stagnates above the flame. flange 29: andv prevents its lodging and-conlensin on that flange. This action of the air flow through holes 191) is supplemented-and reinforced by the air flow B1 passing through the small annular space between flange 2t and the baffle l9.

The drawingsacove describedshow two inventions, first, the mantle mounting and its cooperating parts, and second, the chimney and its cooperating parts. The said second invention is not claimed herein, as it constitutes the subject matter of a separate application, Serial Number 161,812, filed May. 13, 1950, the claimed subject matter of the present application: being said first invention.

In Figs. 3 and 4, the mantle mounting ii, I8 is shown respectively in plan View and in elevation, removed from the-rest of the burnerstructure.

In the past it has been a common practice to make the burner cone. such a part of the burner itself, that it must have the stability and sturdiness to withstand deterioration for the entire life of the burner. This has necessitated making the burner cone of sheet metal having substantial thickness, and of material well adapted to withstand the corrosive and erosive effects of high temperature, for example, sheet brass. This has resulted in a high degree of heat conduction from the burner cone which is highly heated by its nearness to the burner flame, to other parts of the burner structure and particularly to the outer wick tube, which is a result that is most undesirable, to avoid which different expedients have been heretofore proposed. By thepresent invention, the burner cone I8 is a part of the mantle 6 mounting. and: i's-renewed with eachmantle renewal, and this permits making the burner cone short lived, as long as it will outlast the mantle,

and to that. end said burner coneis madeof thin ferrous metal or alloy which is relatively highly resistant to heat conduction, and this together withthe thinness of the metal of the cone, results in relatively small heat conduction through the burner coneto other parts. of the burner. The mounting member I! is made of similar thin sheet material of ferrous. metal. or alloy, which results in the entire mantlemounting. being highly resistant to heat. conduction. In Fig. 4, the large perforations 3| in the mounting memher I! for. receiving. outer mantle air, are shown and also prongs 34 formed from the thin metal of the member for securing the mantle mounting in use,.to the upper end of thegallery. In Fig. 4, oneof the indentations 35 is shown, holding the lower portionsof the mounting members H, H! securely together.

In Fig. 6, one of the brackets 36 is shown as rigidly secured to the upper portion of the mounting member I1, therebeing two of these brackets diametricallyopposite each other as shown in Figs. 3 and 4, to. be secured to and support the lower ends of the harp 23-. I

In Fig- 5, aportion of the mantlemounting is shown in verticalsect-ional view to an enlarged scale, to illustrate the structure controlling the flow. of air currents through and-around the mantle mounting asabove described inconnection with Fig. 2. The horizontalportion of the member [1: for resting on the upper-endof the-gallery I5, is shown at lid, and the lower cylindrical portion of said member closely adjacent and secured to the-lower end portion of the cylindrical portion of the burner cone I5, is shown at Hb, thereby formingabove the portion He, the circular groove for receiving the lower end of the mantle adjacent the perforations 3 i.

It will be noted in Fig. 5, that the portion I; of the annular vertical wall of the burner cone :8, is slightly conical'and converging upwardly. This ,facilitatesand aids in turning the column of outer flame air from vertical flow to horizontal flow as above described-in connection with Fig. 2.

Theimportance of avoiding deformation of the walls of the burner cone l8, and particularly of its upper horizontal; portion, is apparent from the aboved escription' of the metering action of the burner cone on the outer air delivered to the flame-by the burner cone. Any such deformation, results in the unsymmetrical supplying angularly, of outer air to the flame, also unsymmetrical burning of the flame, and also unsymmetrical incandescence ofv the mantle and imperfect illumination. With the present invention, each mantle renewal provides a new and correctly adjusted burner cone, which; when put in place onthe burner, insures the correct metering of theouterair-and the symmetrical delivery of the sameangularly to theflame. A e

As shown by the dotted line 2911, Figure 2, the upper faces of the humps 29 of the chimney l6 slope peripherally of the chimney. Each face slopes in like sense so that as the chimney is rotated relative to the gallery l5 (and the lugs 30) the portion of the humps engaged by the lugs rises relative to the base of the chimney and the chimney is brought into progressively snugger engagement with the humps 29 of the band 21. i In a practical embodiment of'the present invention it has been found desirable to use50 or more holes l9b uniformly spaced about the baffie I9, each being 0.040 inch or less in diameter. Moreover, it has been found desirable to make the 'radial spacing between the outer periphery of the flame flange 20 and the inner periphery of the upper portion of the bafile 19 of the order of 0.006 to 0.008 inch, this spacing being assured by providing a small number of radial extensions (not shown) on the flat portion of flame flange 20 .extending this distance from the remainder of the outer periphery and seating against the bafile [9. These extensions also center the flame flange relative to the bafile.

While I have shown my invention in the particular embodiment above described, I do not limit myself thereto as I may employ equivalents thereof without departing from the scope of the appended claims.

I claim:

1. A replaceable mantle mounting adapted to fit in and seat upon the seating flange surmounting the annular gallery of an incandescent mantle lamp burner of the type havin a cylindrical baflie below the upper end of the seating flange, the b'aflle terminating at its upper end in an inturned horizontal flange located below and in registry with the seating flange: the mantle mounting comprising a first part of thin sheet metal having upper and lower portions of larger and smaller diameter, respectively, and an intermediate annular portion adapted to fit on the seating flange; and a second and inner part of thin sheet metal having a cylindrical portion aflixecl to the lower portion of the first part and extending thereabove and a flange portion surmounting the cylindrical portion extending inwardly to define a burner cone when the mounting is in use, the lower portions of the first and second parts defining a skirt extendin to a predetermined distance below and outwardly of the baffle to meter outer air supply to the burner.

2. A replaceable mantle mounting adapted to fit in and seat upon the seating flange surmounting the annular gallery of an incandescent mantle lamp burner of the type having a cylindrical bafile below the upper end of the seating flange, the baffle terminating at its upper end in an inturned horizontal flange located below and in registry with the seating flange: the mantle mounting comprising a first part of thin sheet metal having upper and lower cylindrical portions of larger and smaller diameter, respectively, and an intermediate horizontal annular portion adapted to rest on the seating flange; and a second and inner part of thin sheet metal having a cylindrical portion aflixed to the lower portion of the first part and extending thereabove and a flange portion surmounting the cylindrical portion extending inwardly to define a burner cone when the mounting is in use, the lower portions of the first and second parts defining a skirt extending to a predetermined distance below and outwardly of the bafile to meter outer air supply to the burner; and an incandescent mantle extending at its lower end into the region between the inner and outer upper portions of the mount- 3. A replaceable air metering and directing mantle mounting for a burner having annular flame producing means and a bafile surrounding the flame producing means terminating at its upper end in a fiat annular surface, the burner further defining an annular seat above and spaced radially outwardly from said surface: the mantle mounting being of relatively thin sheet metal, having an annular portion adapted to fit on the seat, a depending skirt portion adapted when the mounting is in position to extend below and outwardly of the flat annular surfac to meter outer air flow to the flame producing means, the mantle mounting further defining spaced cylindrical walls extending upwardly from the seat, the inner wall extending inwardly at its upper end with a substantially degree change in direction to form an apertured dome defining a burner cone when the mounting is'in position.

4. An air metering replaceable mantle mounting for use with a burner defining an annular seat surrounding an annular flame forming structur and in which optimum operation requires accurately directed and metered air flow about the flame, said mantle mounting comprising a cylindrical member of relatively thin metal having relatively low thermal conductivity, an outwardly extending flange to fit on the seat, an inwardly extending flange extending towards the flame to meter and direct air thereto, and a downwardly depending skirt for guiding and metering the air flowing toward the flame.

5. A replaceable air metering mantle mounting and burner cone for an annular flame type burner, the mounting being of relatively thin sheet metal defining coaxially disposed cylindrical inner and outer upper portions joined at their lower edges by an annular seat and a cylindrical lower skirt portion extending downwardly in substantial continuation of the inner upper portion to meter outer air flow to the burner, the inner upper portion having also at its upper extremity an inwardly extending flange forming a burner cone, and harp means carried by the outer upper portion for supporting a mantle with its lower end freely suspended in the annular recess formed by the two upper portions and said annular seat.

WALTER B. ENGH.

REFERENCES CITED The following references are of record in the file of this patent: e

UNITED STATES PATENTS Number Name Date 771,425 Gronblach Oct. 4, 1904 2,311,253 Rinman Feb. 16, 1943 FOREIGN PATENTS Number Country Date 46,514 Norway June 3, 1929 150,691 Austria Sept. 25, 1937 

